Method of treating cakes of artificial silk manufactured by the can spinning process



April 9, 1929. H. KUTTNER 1,708,583

METHOD OF TREATING CAKES OF ARTIFICIAL SILK MANUFACTURED BY THE CANSPINNING PROCESS Filed March 9, 1928 Fig; Fig/0 Patented Apr. 9, 1929UNITED STAT-ES HUGO xur'rmm, or nREsnE'N,

PATENT OFFICE.

GERMANY, ASSIGNOB TO THE FIRM FR. KIl'TTNER AKTIENGESELLSCHAFT, OFPIRNA-ON-THEELBE, GERMLANY.

Application filed llarch 9, 1928, Seriahflo.

Hitherto in the can spinning process the rinsing and the subsequentfurther treatment have been carried out in the hank. After being removedfrom the cans, the cake which, according to the particular spinningprocess employed, contains preciptant or other chemical substances hadto be placed on the reel in the form of a hank and was thereupon firstrinsed and subjected to further treatment. Owing to the manufacturingconditions the cakes could not be passed directly to the reel afterspinning, but had to be stored for a greater or less period of time.This involved all manner of disadvantages which would easily causedamage to the filament.

It is the object of the present invention to overcome this drawback in asimple manner. The invention consists substantially in this, that thematerial is not rinsed and further treated in the hank, but in apeculiar manner in the cake. The spun cakes, after being removed fromthe can are folded to- 4 gether, i. e. are flattened, which may bereadily effected by hand without disturbing the convolutions of thefilament. They can be stacked in the folded state next to each other andone upon the other and, if packed neatly, form a close layer withoutspaces. The cakes, when placed together, may for instance be packed in asimple manner in a container having perforated walls, whereupon watermay be forced through or drawn through by suction. Thus, a thoroughrinsing will take place in a short time. Apparatus constructed in themanner of the known mechanical dyeing apparatus working on the packingsystem may suitably be used for this purpose with success. 7

The process which is extremely simple is very elfective and of greatimportance. The

ed together lies in a steady LIANUFACTURED BY THE CAN 260,396, and inGermany March 14, 1927.

artificial silk in the form of a cake and foldposition during treatment,the liquid which is in motion flow- 1ng through it, so that the materialis well protected from being damaged. The silk may be rinsed andacidulated, and in the case of viscose silk freed from sulphur, bleachedand even dyed and avivated in the same ap paratus.

The treated cakes can be readily brought back into their original shapeand reeled.

In the accompanying drawings:

Fig. a top box, packed and covered with a celluloid sieve.

Fig. bsingle box, containing 12 cakes.

Fig. c a block composed of a number of separate boxes. The top box showsthe fluted bottom. The block rests on an underframe for shifting itabout.

Figs. d and e show a cake removed from the spun centrifuge.

Figs. f and g the same cake pressed flat.

Fig. h shows the box in which the layer of cakes is covered with thecelluloid sieve for protection when removing the box.

Fig. i shows the layer of cakes lying on the celluloid sieve after thebox has been removed.

Fig. k shows a single cake opened out.

Fig. 1 shows the opened out cakeslippcd on to a resilient celluloidband.

What I claim is:

A process for the treatment-of cakes of artificial silk manufactured by:the can spinping method, consisting in pressing the cakes flat andthereupon rinsing them and subj ect'ing them to any further treatment.

In testimony whereof I have signed my name to this specification.

' HUGO KI'JTTNER.

